Warp beam



B. B. CARY 2,683,573

WARP BEAM Filed May 5, 1949 FIE- U.

FIE-4; I-

A TTORNEIVS Patented July 13, 1954 WARP BEAM Beecher B. Cary, Jackson,Mich., assignor to Hayes Industries, Jackson, Mich., a corporation ofMichigan Application May 5, 1949, Serial No. 91,580

1 Claim. 1

This invention relates to so called warp beams as employed in thetextile industry, upon which thread, yarn or fiber is wound toconstitute a supply for ultimate use in the fabrication of the thread orthe like into a desired article or form.

The present invention is concerned with improvements in such warp beamsand With the manufacture and construction thereof from a metal cylinderhaving metal fianged end caps which provide the end bearings forsupporting the beam as a whole and define the side walls of the annulussurrounding the metal cylinder and into which the thread or the like iswound.

In connection with warp beams of the above described character theconstruction has to be such that the metal end flanges defining the sidewalls of the annulus are capable of withstanding the exceedingly highpressures developed thereagainst in the winding of the thread or thelike into position. While the strength necessary for such purpose can beimparted to the end caps themselves, by appropriate ribbing orreinforcing the caps, this does not take care of the connection of theend caps to the metal cylinder, which connection has to be such that theend caps cannot be broken away from the cylinder in their region ofconnection therewith.

An object of the invention is to provide a metal warp beam havingseparate metal fianged end caps telescopically engaged with the oppositeends of the cylinder and inter-connected therewith in such manner thatthe end caps become intimately interlocked with the cylinder endportions and are not liable to be torn away therefrom in use.

According to the invention a warp beam of the character described isfabricated from metal tubing of the desired length and from separatelyconstructed metal end caps, which latter are formed to have telescopicengagement with the ends of the tubing and this through the medium of anintimate interlocking action between mutually engaged buttress typethreads on the telescoped portions, said engaged threads presenting toone another an axially extending series of substantially radialshoulders and inclines, which react with one another to resist anendwise thrusting of the end caps off their respective tube ends, withan attendant wedging of the end caps firmly and closely against the tubeends.

The required intimate inter-connection may be obtained by a shrinking-onprocess which involves pie-forming the buttress threaded portions of thecylinder ends and of the end caps to different pitch diameters anduniting the parts together with the employment of heat to expand the onepart to permit inter-engagement of the threads, followed by cooling withan attendant shrinking of the one part onto the other and theconsequential obtaining of intimate interlocking engagement between therespective threads.

The above and further objects and advantages, residing in the specificconstruction, combination and arrangement of parts will more fullyappear from a consideration of the following specification and theannexed claim.

In the drawings,

Fig. I is a vertical section of a warp beam constructed in accordancewith the invention, the center portion of the beam cylinder being shownbroken-away for ease of illustration.

Fig. II is an enlarged fragmentary section of one of the screw-threadedend portions of the cylinder, and

Fig. III is a similar view to Fig. II but of the screw-threaded portionof the corresponding end cap.

Referring to the drawings, a warp beam is shown composed of a cylinderl0 and a pair of end caps, indicated generally at l2, and each fittedwith a bearing spindle 14 both coaxial with one another and with thecylinder and providing a rotatable mounting for the warp beam, when inuse. Each end cap also provides an annular flange I6 extending radiallyfrom opposite ends of the beam cylinder and defining with the latter anannular cavity 18 into which the yarn, thread or fiber is wound andaccommodated in a closely packed assembly as is well known in the artand which imposes a very high outward pressure upon the flanges 16,which latter are ribbed or reinforced, as indicated at 20 to withstandsuch pressure.

Each end cap is also formed to provide a tubular central sleeve portion22 which is externally screw-threaded, as indicated generally at 24, forengagement with correspondingly internally screw-threaded ortions of theopposite ends of v. the cylinder, and as indicated generally at 26.

The existence and form of this screw-threading constitutes the essenceof the present invention and is the means relied upon to maintain anintimate jointing of the end caps and cylinder ends such that the endcaps are not liable to be broken awa from these ends by the pressuresacting against the flanges I6 and above mentioned, To this end, thepresent invention makes use of buttress type threads to constitute thesaid screw-threaded portions, which threads present axially extendingspaced series of substantially radial shoulder abutments 28, 28' andintervening wedging inclines 30, 30 as appear clearly in Figs. II andIII. These abutment shoulders and inclines, with the latter directed asshown and the end edges 32 of the cylinder tapered also as shown,provide a secure interlocking action by whichthe mutually; engagedsubstantially-radial abutment shoulders 28, 23 resist endwise or axialmovement of the end caps in the direction of their correspondingcylinden: ends and the mutually engaged inclines 30, 30,

tend to maintain the outer edges 34 of the cylinder ends in close linecontactrwith the 'in'sidee surfaces of the flanges 16, wherebytouexcludei the existence of any openings at the corners 36.

While provision may be made, for. the extennally screw-threaded capsleeves 22 to be screwed into position with respect to the interior.sorewthreaded cylinder ends, in which case the screwthreads have thesame pitchzdiameters' and .the employment of locking .rivets 38: isindicated'as Y necessary to augment the interlock, it has: been"-foundin practice that a-veryefiicient intimate i Havingthus describedmyrinvention what-1' clairnruas :novel: and wish to ;cover by LettersPatent is:

A warp'beam adapted to, carry a plurality :of win'dingscof filamentary.materialxand :to. wither stand great pressures exerted by said woundmaeterial,. .;comprising a metal cylinder: and :a .pair ofend caps, eachend cap having a centrally disi-n posed axial bearing portion, asubstantially radial annular flange having a radial inner face and acylindrical portion extending axially inward from said radial innerface, the ends of said cylinder telescoping over the cylindricalportions of said caps and abutting said radial inner faces to form tightjoints, the outer surfaces of said cylindricalportions and the innersurfaces of said ends of said cylinder having buttress-type screwthreads thereon shaped as inter-meshing similar opposed alternate wedgesand radial shoulders, said opposed wedges having surfaces inclinedoutwardly toward said flanges and said radial shoulders being in opposedengaging positionsandnthe: end edges of said cylinder tapering outwardlytoward said flanges, whereby when sa-id end .capsrare screwed into theends of said cylinder said opposed shoulders will engage with each otherto resist endwise movement of said caps relative to said cylinder andthe outer edges of-said cylinder willbe maintained in close line contactwith said radial innerfaces, despite the great pressures exerted by saidwound material.

References Cited in the file of this patent UNITEDVSTATES PATENTS Number1 Name- Date 361,289 Howes Apr. 19, 1887 541,507 Sellers June 25, 1895651,625 Hendrick June-12, 1900 1,004,270 Jahnke' Sept. 26,1911 1,272,581Van Dom July 16,- 1918 1,287,857 Brandt Dec. 17, 1918' r 1,523,463'-Thomson Jan. '20, 1925 2,144,928 Moncrieif Jan. 24, 1939 2,267,339Paulsen- Dec. 23,1941

FOREIGN PATENTS Number Country Date- '7/797 Germany Mar. 14,1938

